Lee Kang-guk was flying the plane that crash landed in San Francisco on Saturday and was working toward qualifying on the Boeing 777. Mr. Lee, born in 1967, was attempting his first 777 landing in San Francisco and his ninth overall with that model. He had previously landed the 777 in Narita, London, Heathrow and Los Angeles.

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Mr. Lee has landed previously in San Francisco on Boeing 737s from 1999 through 2004.

A Korean transport ministry spokesman said Mr. Lee was in charge of flying the plane from five hours before landing time. He has 43 hours of experience flying 777s, roughly the equivalent of three to four trans-Pacific flights.

Mr. Lee joined Asiana as a trainee in 1994 and gained his pilot’s license in 2001. He has just under 10,000 hours of flying time.

The Korean government, in line with the rules set by the International Civil Aviation Organization, requires 20 takeoffs or landings, not simulations, before a pilot can fly without a supervisor or trainer. Alternatively, a pilot may have 60 hours of flight time including 10 takeoffs or landings.

Asiana’s rule on shifting to a new aircraft type is more strict, requiring 22 landings as well as a final inspection before the pilot is qualified.

Lee Jeong-min

Lee Jeong-min, the most experienced pilot on board with 12,387-hour flight record, was watching as Lee Kang-guk was landing the plane, as his trainer. Born in 1964, Mr. Lee Jeong-min has 3,220 hours of flight experience in the 777 model.

Lee Jeong-ju

Born in 1960, has about 10,000 hours of flying experience.

Bong Dong-won

Born in 1972, has about 5,000 hours of flying experience.

Correction: Lee Kang-guk has landed previously in San Francisco on Boeing 737s from 1999 through 2004, according to Asiana Airlines. A previous version of this article said he has landed the 747 aircraft type there.